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Antibirth adds a few new types of pickups.
Hearts[edit | edit source]
Immortal Heart[edit | edit source]
Immortal Hearts are white hearts which append to the end of the health bar like soul hearts.
Immortal Hearts always take two hits to be fully depleted, and will regenerate from half to full upon clearing a room.
Immortal Hearts replace Eternal Hearts with a 50% chance and do not spawn in any other way, except for one room in the Corpse.
Rotten Heart[edit | edit source]
Rotten Hearts are infested red hearts which fill up a full heart container. If a Rotten Heart is picked up at full health, it will replace the rightmost red heart.
For each Rotten Heart possessed upon clearing a room, two blue flies will spawn. You cannot have half a Rotten Heart; they are always depleted in one hit.
Depleting a Rotten Heart will not count against Devil Deal Chance when it's the rightmost red heart.
Rotten Hearts are unlocked by entering the Corpse for the first time.
Notes[edit | edit source]
- Although a Rotten Heart is depleted in one hit, under certain circumstances Isaac can have half a rotten heart. By taking any full heart source of damage with half a regular red heart next to a rotten heart, the rotten heart will appear "halved". This includes sources of damage after Mom, and The Sharp Plug.
- A half Rotten Heart looks nearly identical to a half Red Heart, but it also spawns two blue flies. Grabbing a regular red heart will "repair" it. Taking half a heart of damage will destroy the half rotten heart; however, taking a full heart of damage will deduct a full red heart in addition to the rotten heart.
Pills[edit | edit source]
Three new pill effects were introduced in Antibirth.
|Shot Speed Down|
Decreases shot speed.
|Shot Speed Up|
Increases shot speed.
Notes[edit | edit source]
- It is possible for an Experimental Pill to decrease health while Isaac has one heart container, killing him.
Runes[edit | edit source]
|Rune||ID||Icon||Message||Unlocked by completing||Effect|
|Rune of Gebo||60||"Charity"||4x. Bloody Mary||Donates to a machine or beggar|
|Rune of Kenaz||61||"Pestilence"||2x. Scat Man||Poisons all enemies in the room|
|Rune of Fehu||62||"Wealth"||3x. Turbo||Turns all the pickups in the room into coins|
|Rune of Othala||63||"Legacy"||9x. Seeing Double||Rewards a random item that Isaac already holds|
|Rune of Ingwaz||64||"Treasure"|
|Rune of Sowilo||65||"Renewal"|